CATDOLL : CATDOLL: What are the methods for diagnosing common diseases of crayfish?

What are the methods for diagnosing common diseases of crayfish?

Spring and summer are also the seasons for lobster farmers to raise a large number of crayfish. Especially for farmers living in rural areas, some farmers can raise some crayfish to increase their income. Perhaps farmers think that crayfish are very easy to raise, but in the process of raising crayfish, they will also find that a large number of crayfish die, or some diseases occur in crayfish, which causes heavy losses to lobster farmers.

The main reason for these situations is that lobster farmers do not have much professional knowledge of lobster farming, which also leads to large-scale deaths of lobsters during the breeding process. So how to diagnose crayfish diseases? How to judge?

1. Determination of parasitic diseases

If green hair, yellow hair and black dirt are observed on the carapace and tail of crayfish, and protozoa or fungi such as dactyls are found in microscopic examination, it can be determined to be a parasitic disease. If a parasitic disease occurs, the anthelmintic drug Scico can be used.

2. Judgment of black gills

Open the cephalothorax of the crayfish. If you observe that the gill filaments are black or yellow, it can be judged as black gills.

3. Diagnosis of enteritis

The intestine is extracted from the tail segment. If it is observed that there is no food in the intestine, there are vacuoles, congestion (blue blood cells), and the intestine is blue, then the spinal disturbance can be judged as enteritis.

4. Diagnosis of Vibrio disease

If you observe that the crayfish has broken whiskers and claws, black or yellow tips, water accumulation in the tissues at the edge of the tail fan, whitish liver, black gills, low vitality of the stools, and only the large crayfish die, it can be judged that it is Vibrio disease and it is best to do a Vibrio test.

5. Judgment of Vitiligo Syndrome

When peeling off the cephalothorax of crayfish, if you observe spots on the cephalothorax and large areas of death on the shrimp body, it can be diagnosed as white spot syndrome.